Question about Carnivore roms

I have a problem with those roms, I download the roms at its official git but openmsx doesnt recognize those roms, and I don´t know how to convert it to openmsx format nor have a tool to extract from real hardware, any solution about this issue?

The question is which version was used when the extension was created and which versions are now online. You can simply try to replace the sha1sum in Carnivore2.xml with the one of your downloaded ROM.

The Carnivore2 emulation requires the OpenMSX build 200 or later and the 2 files: carnivore2.xml and carnivore2.rom. The ROM file contains the image of the initialized cartridge's FlashROM chip with the current versions of all 3 ROMs. This image with ROMs is used to boot the cartridge so that newer separate ROMs from the repository could be updated later with the C2MAN utility.

As far as I know we got all necessary permissions to produce the cartridges. This is thanks to Javi Lavandeira. The FMPAC BIOS was reworked by Max Iwamoto, so this can be considered as his own version. There were no objections either from him or from Konamiman, who made the Nextor ROM. The original copyright owner for FMPAC BIOS could not be contacted so far, but I doubt that they still care about the usage of their code in a free emulator.